Black Mesa - Industrial, run by humans, gravity gun,tau cannon, H.E.V Suit, D0g if I am right some other stuff I'm forgeting.
I played Portal more than Half life 2 when I got the orange box so I dont have much knowledge.
Aperture - Used to be run by humans, now a killer AI, run buy robots, always clean
minus the condemned places(offices, ratman dens), long fall boots, Gels, wants to run the facility alone, lasers, energy pellets.